TPS563207: Improvement Ripples for TPS563207

Eliran Gilad

Part Number: TPS563207

Hi - I got a card with design for power supply TPS563207 and I measured large ripple (noise) on the load.

The power supply designed for max current of 0.9A and output voltage of 1.2v. I selected inductor of 3.3uF PN XAL5030-332MEB ( COILCRAFT ).

How much capacitance should I assemble on the power supply output, and on the location of the load?

Can you simulate it for minimum ripple on the load?

Thanks,

Eliran.

over 1 year ago

0 Shuai Fan over 1 year ago

TI__Genius 12981 points

Hi Eilran!

Could you please the waveform of the large ripple you mentioned. We will help to make a further analysis.

Shuai

0 Eliran Gilad over 1 year ago in reply to Shuai Fan

Prodigy 10 points

Hi -see below waveform. Peak to Peak ripple is around 43mv

0 Ruby Li over 1 year ago in reply to Eliran Gilad

TI__Expert 7430 points

Hi Eilran

Thanks for the quick feedback, here are my comments:

1. Would you mind sharing me the schematic of the application? And also the layout please.

2. I would like to confirm that whether you used the smallest loop for the ripple test?

3. Would you mind helping me zoom in the waveform with around 6 duty cycles? And I would also like to check SW voltage and inductor current at the same time.

Thanks .

Ruby

0 Eliran Gilad over 1 year ago in reply to Ruby Li

Prodigy 10 points

Hi - I can send additional files by the mail or by the support mail. please let me know which address.

0 Ruby Li over 1 year ago in reply to Eliran Gilad

TI__Expert 7430 points

Hi Eilran

Please send by email: ruby-li@ti.com.

Thanks.

Ruby

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TPS563207: Improvement Ripples for TPS563207